how to fake 2 middle contacts of cell phones

Discussion in 'The Projects Forum' started by newhutk, Dec 2, 2008.

  1. newhutk

    Thread Starter New Member

    Dec 2, 2008
    most current smart phones have 4 contacts in the battery.
    1 is + , 1 is for + and 2 middle contacts are for current and temp monitoring.

    The phone is working ONLY when all 4 contacts of battery are connected with 4 contacts from the phone.

    I am using AA batteries to power the phone (however, I can give only only + and - contact). How can I fake or fool around these middle 2 contacts so that the phone is still working without connecting these 2 middle contacts?

    I tried to ground these 2 middle contacts of the phone, and connect only + and -, but it did not work.
    The problem does not happen when I use my old cell phone with 3 contacts (the middle contacted is disconnected, but the phone is still working).

    Thank you all

  2. mik3

    Senior Member

    Feb 4, 2008
    Where did you find this information about the battery?
  3. newhutk

    Thread Starter New Member

    Dec 2, 2008
    I found the information about the battery through some other forums, asking collegues who are working to repair cell phone but they do not know how fake that middle contacts so that the phone can wake up.